If Walsh is ready for next week, he may have to step up this week. He may not be 100% but who is and he is bound to be fitter than 90% of the players who played this weekend as they will be shattered.
May even be worth having him on the bench to come on after the big hitters have made their first runs in the opening 20 - 30 minutes. I'm sure he would provide a boost, both to the crowd and then the team.